EP1892204A1 - Vacuum conveyor for transport, depositing and stacking of flat objects - Google Patents

Abstract

The conveyor has a circulating transport belt (2) and is a belt conveyor (1) whose transport belt has suction blocks (6, 6a-6c, 9) in succession at intervals in the transport direction with suction cup connected to the housing and that contact the transported material to pick it up, transport it and deposit it. It has a stroke-controlled vacuum pump arranged on the housing of the suction block.

Description

The invention relates to a vacuum conveyor according to the preamble of patent claim 1.

A related art, for example, from DE 27 20 030 B2 refer to. In the local vacuum conveyor, the principle is that on a rotating conveyor belt, for. B. a toothed belt, one behind the other in the conveying direction and a plurality of suction blocks is arranged, each suction block consists essentially of a housing which is attached to the conveyor belt and a suction cup connected to the housing, which sucks on the conveyed material and pick it up and transport it.

In the mentioned DE 27 20 030 B2 does not generate its own vacuum on the suction cup. Rather, the necessary vacuum for receiving the conveyed limited to the elastomeric restoring force of the suction cup, which deforms when pressed onto the object to be conveyed and thereby generates a vacuum in a conventional manner.

From this document it can also be seen that the venting of the vacuum, when it is no longer needed, by tilting the housing of the Saugblockes done, this tilting is done against a spring.

When tilting the housing thus a vent hole is free, which sucks air from the outside and so picks up the vacuum.

A link control, that is, a stroke control of the housing or the suction cup is not apparent from this document.

With the DE 1 231 624 B2 Another suction conveyor has become known in which the suction blocks consist of individual suction chambers to which the vacuum is supplied via a perforated conveyor belt. The vacuum generation is therefore extremely unfavorable, expensive and unreliable.

Otherwise, this document also discloses by spring load on the cargo pressed, elastomerically deformable suction cups, which also in the already mentioned DE 27 20 030 B2 are known.

With the subject of DE 1 205 451 B2 Another suction conveyor has become known, in which the vacuum is supplied to the suction cups via a respective vacuum-carrying hose.

It is understood that such a vacuum guide is extremely difficult and prone to a circulating belt conveyor.

The invention is therefore based on the object, starting from the DE 27 20 030 B2 to develop a suction conveyor of the type mentioned so that the vacuum is maintained in the respective suction cup over a longer time and not only depends solely on the elastomeric properties of the suction cup.

To achieve the object, the invention is characterized in that the housing of the Saugblockes a stroke-controlled vacuum pump is present.

With the given technical teaching, there is the significant advantage that by the respective separate arrangement of a stroke-controlled vacuum device on the suction block now has the ability to produce individual negative pressure in the suction block, this negative pressure is maintained over a longer distance, because each with the operation the vacuum pump, the negative pressure in any way and can be generated as long as desired.

Thus, it is now possible for the first time that one does not rely solely on the elastomeric properties of the suction cup, which generates the negative pressure, but one can arbitrarily generate according to the requirements of negative pressure in the respective suction block.

Although is out of the DE 1 058 938 B2 to already remove a lifting control on a suction block; However, this lift control is only used to control the vent valve and not to generate a negative pressure.

In the technical teaching of the invention, there is the advantage that even with slight damage to the suction cup always by pressing the vacuum pump, a vacuum can be replenished, so that the total life of such a belt conveyor with attached suction blocks is much larger.

Another advantage is that an undesirable escape of negative pressure on the surface of the transported material is now compensated by the generation of a vacuum in the region of the suction block, whereby the plant operates more reliable. In particular, when the vacuum escapes over the rough surface of the cargo, it is usually no longer possible to convey the cargo safely.

This is where the invention comes in, which provides for the generation of a negative pressure and therefore results in reliable delivery even on rough surfaces.

In the own, older patent application DE 10 2005 007 472 a vacuum conveyor has been described in which the vacuum in the respective suction block is done by supplying overpressure into the suction block and in the suction block a Venturi nozzle is arranged, which generates the required negative pressure on the suction cup. Disadvantage of this arrangement, however, was the relatively large air consumption for the generation of negative pressure.

This is where the invention begins, which provides mechanically actuated vacuum pumps in each suction pad.

However, instead of the arrangement of mechanically operated vacuum pumps, all other vacuum pump can be used, such. As well as electromagnetically operated vacuum pumps, permanent magnetically operated vacuum pumps, rotating vacuum pumps, diaphragm pumps and ram pumps.

Thus, all negative-pressure-generating vacuum pumps come into consideration, which according to the invention are arranged in each case in a suction block.

Of course, fall under the spirit of the invention, the rotary lobe pumps, rotary vane pumps, peristaltic pumps and the like.

The invention is therefore not limited to a specific type of vacuum pump, but claims general protection that in the respective suction block a vacuum generating unit is arranged, which is actuated from the outside.

In a preferred embodiment of the invention, it is provided that the vacuum pump is designed as a mechanical tappet pump, the tappet spring-loaded rolls against a arranged on a guide rail of the belt conveyor scenes and performs the necessary lifting movement.

Advantage of the arrangement of a backdrop is that you can assign any number of strokes per conveyor section, depending on which amplitudes assigns the backdrop.

In a preferred embodiment of the invention, it may be provided, for example, to actuate such a pump tappet per meter conveyor length ten times. However, the invention is not limited thereto. It can be provided more or less operating strokes.

It goes without saying that instead of the linearly moved, spring-loaded pump plunger and rotating pump plunger can be used, which achieve an approximately equal number of strokes.

In particular, the invention provides in a development that the pump unit is formed in the suction block as a gear pump and the actuating gear rolls on an associated rack on a guide rail of the belt conveyor and thereby also generates the required negative pressure.

An advantage of the solution according to the invention, namely the arrangement of a stroke-controlled vacuum unit in the suction block is that even an automatic adjustment of a maximum negative pressure is given.

Due to the spring load of the pump plunger, one side of which is connected in an air-tight manner via a check valve to the interior of the suction cup, the pump plunger is no longer moved in the suction direction when a sufficient vacuum is applied in the suction cup. In this case, the spring force of the spring is no longer sufficient to press the actuating plunger against the slide in the guide rail, so that it remains in a certain neutral position and only brought back from the spring in the pumping position (Appendix to the scenery), when the vacuum disappears in the suction cup.

In this way, an automatic maintenance of vacuum is ensured in the suction cup, without it depends on the lifting operation of the actuating plunger. This is only activated when the vacuum has to be refilled.

In addition to a linear piston pump, which will be described below in the embodiments, it is of course also possible to use a double-acting piston pump or a two-piston pump.

Likewise, in the following embodiments, a diaphragm pump is described for which also separate protection is claimed.

In a development of the present invention, it is provided that the drive for the lifting drive of the vacuum pump is independent of the drive of the belt conveyor. In this case, it is preferable if the vacuum pumps, which in the individual suction blocks are arranged, a single, common drive is assigned, which is independent of the drive of the belt conveyor. This results in the significant advantage that now regardless of the running of the belt conveyor - regardless of the fact that the conveyor belt of the belt conveyor is moved or not - always negative pressure can be generated. Even if the belt conveyor is stationary, a desired negative pressure can thus be generated in separately driven vacuum pumps, which is a significant advantage over the prior art.

In a preferred embodiment of this embodiment, it is preferred if the drive for the lifting drive of the vacuum pumps consists of a drive belt, which is acted upon by a separate drive, which operates independently of the drive of the conveyor belt.

Of course, it may be provided in a simple embodiment of the present invention that the drive belt for the vacuum pumps is synchronous with the drive of the conveyor belt and also in response to the movement of the conveyor belt. However, this simple embodiment is claimed only subordinate.

More importantly, the drive belt for the pump tappets of the vacuum pumps in the individual suction blocks operates independently of the drive of the conveyor belt, and it is further preferred here, when the drive of the drive belt is opposite to the movement of the conveyor belt. In this way it is achieved that the suction belt mounted on the conveyor belt moves in one direction, while in the opposite direction of the drive belt (and thus with double speed) on the pump tappets, including blocks, passes, whereby a particularly high drive power is achieved.

Advantage of the opposite drive of the drive belt for the pump plunger compared to the drive of the conveyor belt is thus a low energy consumption, because by the opposite movement practically doubling the strokes of the pump plunger of the vacuum pump is generated, compared to a Drive mode where the drive belt for the pump tappet is the same as that of the conveyor belt.

In a first preferred embodiment, it is provided that this drive belt for driving the pump plunger of the vacuum pumps on its outer side has wave-shaped scenes and the pump tappet with corresponding rollers on the formed by the wave-shaped projections scenery up and down (up and down) and such a particularly simple lifting drive of the pump tappet is given.

In another embodiment of this invention idea, it is provided that instead of a drive belt with external scenes, a simple toothed belt is selected with an external toothing, so that positively engage on this external toothing pinion, which are rotatably connected to a drive shaft, wherein the Pinion and the drive shaft are each arranged in a suction block. The drive shaft is in turn rotatably connected to an eccentric cam, and the pump plunger of the vacuum pump now sits spring loaded on the eccentric cam, which is now inevitably rotated by engaging the teeth of the drive belt.

In this way, a simple rotary drive for the eccentric cam and thus a simple displacement drive for the pump plunger of the vacuum cups arranged in the individual suction cups is ensured.

Although the previously described embodiments relate to spring-loaded driven pump tappets of lifting pumps, this is not to be understood as limiting the present invention. The present invention covers all pump types, as mentioned above and important in the latter group of inventions, that an independent and independent drive of the vacuum pumps is independent of the drive of the conveyor belt of the belt conveyor.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

Figur 1:

schematisiert gezeichnete Darstellung eines Bandförderers mit einigen Saugblöcken;

Figur 2:

Unteransicht der Anordnung in Richtung des Pfeils A in Figur 1;

Figur 3:

vergrößerte Darstellung nach dem Detail B in Figur 2;

Figur 4:

Schnitt gemäß der Linie C-C in Figur 3;

Figur 5:

Schnitt durch eine gegenüber Figur 4 abgewandelte Ausführungsform mit Verwendung einer Membranpumpe;

Figur 6:

die Hintereinanderanordnung von mehreren Saugblöcken mit eingebauten Membranpumpen.

Figur 7:

ein abgewandeltes Ausführungsbeispiel, bei dem ein eigener Antriebsriemen für den Antrieb der Pumpenstößel in den Saugblöcken vorhanden ist - im Längsschnitt -

Figur 8:

Schnitt gemäß der Linie VIII-VIII in Figur 7

Figur 9:

Schnitt gemäß der Linie IX-IX in Figur 7

Figur 10:

schematisiert ein weiteres Ausführungsbeispiel für einen unabhängigen Antrieb der Unterdruckpumpen mit einem Zahnriemen

Figur 11:

Schnitt gemäß der Linie Xl-Xl in Figur 10

Show it:

FIG. 1:

Schematically drawn illustration of a belt conveyor with some suction blocks;

FIG. 2:

Bottom view of the arrangement in the direction of arrow A in Figure 1;

FIG. 3:

enlarged view of the detail B in Figure 2;

FIG. 4:

Section along the line CC in Figure 3;

FIG. 5:

Section through a modified with respect to Figure 4 embodiment using a diaphragm pump;

FIG. 6:

the series arrangement of several suction blocks with built-in diaphragm pumps.

FIG. 7:

a modified embodiment in which a separate drive belt for driving the pump plunger is present in the suction blocks - in longitudinal section -

FIG. 8:

Section according to the line VIII-VIII in Figure 7

FIG. 9:

Section along the line IX-IX in Figure 7

FIG. 10:

schematically another embodiment of an independent drive of the vacuum pumps with a toothed belt

FIG. 11:

Section according to the line Xl-Xl in Figure 10

In Figure 1, a belt conveyor 1 is generally shown, which consists in the embodiment shown of a conveyor belt 2, which preferably consists of a toothed belt having an internal toothing 3.

Of course, the invention is not limited to the formation of the conveyor belt 2 as a toothed belt. It can be used all conveyor belts, such. As smooth conveyor belts made of an elastomeric material, link chains, individual chain conveyor with mutually parallel chains, V-belt conveyor and the like. So it can be used all longitudinal conveyor.

In the illustrated embodiment, the toothing 3 of the conveyor belt 2 runs over in each case one deflection roller 4, 5, of which at least one is driven.

On the surface of the conveyor belt 2 now a plurality of suction blocks 6 are arranged, wherein in the drawing of Figure 1, only these suction blocks 6, 6a, 6b, 6c are shown, while at the indicated lines still further suction blocks 6 are provided, the drawing Simplification because of not drawn.

The conveyor belt 2 is conveyed along on its inside on a fixed slide strip 26. The slide bar 26 serves as a counter bearing for the stroke control of the suction cups 9. Each suction block 6 is shown in Figures 1, 2 and 3 of a housing 30 at the front end of a Suction cup 9 is arranged, all suction cups in the direction of arrow 8 rotate with the conveyor belt 2.

For receiving a conveyed material 7, first the suction bell 9 is raised in the direction of arrow 17 (see FIG. 4) to the right, so that it occupies the raised position as in FIG. 1 in the suction block 6a.

To pick up the cargo then the stroke is overcome in the direction of arrow 17 and the suction cup 9 moves out so that it touches down on the surface of the cargo 7 and at the same time this vacuum is applied via the suction cup 9.

At the suction block 6c is now the full vacuum in the direction of the conveyed 7, which is thus taken in the direction of arrow 8.

The suction cup 9 is preferably made of an elastomeric material, for. As rubber, rubber or plastic and the suction port has approximately in the middle of a suction bore 10, behind which a check valve 19 is arranged. The check valve 19 is connected in an air-tight manner with the pump chamber 29. In this case, the lower end of a pump plunger 13 projects into the pump chamber 29, in which the one end of a spring 15 is supported, whose other end is supported at the bottom of the pump chamber 29.

The pump chamber 29 is connected to the outside via another check valve 19 via a vent 23 with the atmosphere.

The protruding from the suction pad 6 side of the pump plunger 13 is provided with a roller 14, wherein the roller 14 is pressed due to the spring load of the spring 15 to the surface of a link 22, which is part of a guide rail 12, the side of the belt conveyor 1 along running.

The housing 30 of the suction block 6 is in this case guided longitudinally in opposite U-shaped receptacles, with guide rollers 18 engaging in these U-shaped receptacles.

For stroke control of the suction block 6 with the longitudinal direction of the Saugblockfuß 16 is fixedly attached to the underside of the conveyor belt 2. There is hereby the previously mentioned Hubspiel in arrow directions 17th

By changing the U-shaped receptacle (change in the distance of the U-shaped receptacle in the direction of the conveyor belt 2 thus the stroke of the suction block 6 is set in the direction of arrows 17 and changed in the sense of Figure 1.

To produce a vacuum, it is sufficient to apply the suction cup 9 with its outer suction bands in an air-tight manner to the surface of the material to be conveyed 7 in order to achieve a sealing effect.

This is a significant advantage over the prior art, which had to exert considerable pressure on the suction pad and attached suction cup 9 to deform this elastomer. This can be avoided in the invention that even pressure-sensitive conveyed 7 can be easily promoted. For example, so easily fragile glass plates can be promoted, which was not possible with the prior art, because on the glass plates by generating a negative pressure, a considerable pressure had to be exerted to deform the suction cup 9.

It is of course also possible in the invention, the suction cup 9 in addition stroke controlled overcoming the stroke distance according to the arrow directions 17, but this is not necessary.

By generating the negative pressure of the pump plunger 13 is now moved in the direction of its longitudinal axis characterized in that the roller 14 rolls on a correspondingly curved link 22 in the region of the slide bar 26 along and here per meter conveyor line z. B. a stroke rate of 10 exerts.

As a result, on the one hand, air is sucked in via the suction bore 10 and, on the other hand, the air compressed in the pump chamber 29 is discharged via the check valve 19 arranged on the outlet side via the vent 23.

In Figures 2 and 4, yet another guide rail 11 is shown, which receives the guide roller 18 on the opposite side to the guide rail 12. These guide rails have the task of acting as an abutment for the stroke in the direction of arrows 17 and also to record the weight of the entire suction block 6 with the conveyed material 7 attached thereto.

Subsequently, the controlled supply of atmospheric air is now described in the suction cup 9 to deliver the conveyed 7 back to a certain position of the conveyor line.

For this purpose, the invention provides that in the region of the guide rail 12, a shut-off strip 21 is arranged, which is present only in pieces and which may also be stroke-controlled by a lifting cylinder 24.

At the end of the conveyor line thus the Abschaltleiste 21 is arranged and if this is to come into operation, the lifting cylinder 24 is driven and the Abschaltleiste 21 is moved down in the direction of arrow 25 of Figure 2, whereby a vent valve 20 comes to rest against the disconnect strip 21 and is opened against the force of a spring and hereby introduced atmospheric air through the ventilation channel 31 in the suction cup 9.

Reference to the figures 5 and 6 is described as a further embodiment of a mechanically operated vacuum pump, a diaphragm pump which operates with a liftable and lowerable membrane. All the same effect parts have been designated by the same reference numerals as above, so that now depends only on the explanation of the diaphragm pump.

In the embodiment shown, the pump plunger 13 counteracts the force of the spring 15 on an elastomeric deformable membrane 27, the pump chamber 29th formed. The membrane 27 is ventilated and the back is connected via a vent line 28 to the atmosphere.

By the interaction of the two check valves 19 thus the pressure in the interior of the suction cup 9 is applied and, if necessary, removed by pressing the vent valve 20 again.

FIG. 6 shows that the pump tappet 13 of the diaphragm pump is also supported on the guide rail 22 of the guide rail and raises and lowers the pump tappet 13.

In the general description part, the automatic vacuum keeping in the suction cup 9 has been described. With reference to Figures 4 and 5, this will be explained in more detail.

If there is enough vacuum in the suction bell 9, then the spring force of the spring 15 is no longer sufficient to press the pump ram 13 with its roller 14 against the slide 22. Rather, the pump plunger 13 remains in a retracted into the housing 30 position until vacuum is removed from the suction cup 9 or escapes, in which case the spring force of the spring 15 is sufficient again, the pump plunger 13 spring-loaded against the gate 22 to press so by recovering a certain number of pump strokes to re-generate the vacuum.

The same conditions apply to the diaphragm pump according to FIGS. 5 and 6.

FIG. 7 shows that a drive belt 32 driven independently of the conveyor belt 2 of the belt conveyor 1 is present, which runs over two deflection rollers 33, 34, the deflection roller 34 being designed as a drive roller. In this case, there is a rotary drive in the direction of arrow 35, which is opposite to the drive of the conveyor belt 2 in the direction of arrow 8.

The so-designed drive belt 32 has on its outer side a wave-shaped link 22 for the generation of the pump stroke of the respective pump plunger 13.

The previously mentioned roller 14, which is rotatably arranged at the free end of the spring loaded pump ram 13, thus rolls on the mountains and valleys of the thus formed link 22 of the drive belt 32 from. This results in a lifting drive of the pump plunger 13 in the axial direction, whereby the respectively arranged in the respective suction block 6a, 6b diaphragm 27 is bent and generates a negative pressure in the manner described above.

The two rollers 33, 34 are each mounted on the drive shafts 38, 41.

From Figures 8 and 9 show more details of the structure of Figure 7.

There it can be seen that the respective drive shaft 38, 41 is mounted in side plates 37 and a non-illustrated rotary drive is present, which is able to drive in the direction of arrow 35 at least one drive roller 34. The drive belt 32 has an internal toothing 36, which meshes with an associated external toothing of the rollers 33, 34.

In addition, it is shown that on the common drive shaft 38, 41 each bearing 39 are arranged, on which the guide rollers 4, 5 of the belt conveyor 1 are rotatably mounted with the conveyor belt 2.
The respective drive shafts 38, 41 are in this case received in bearings 40 in the respective side plate 37.

In the embodiment of Figures 10 and 11 is shown as a further drive for a vacuum pump that again an independently driven drive belt 42 is present, which is formed with its internal toothing in the same manner as it is based on the toothing 36 in Figure 7 to 9 was presented. Incidentally, the same terms apply to the same parts.

This novel drive belt 42 also has an external toothing 43, which meshes positively with the outer periphery of the associated drive pinions 44, the drive pinion 44 are rotatably received in the respective suction block 6, 6a, 6b. They are therefore each driven in the direction of arrow 47 when the drive belt 42 is driven in the direction of arrow 35, it thus the individual drive pinion 44 are rotatably driven in the arrow directions 47. They are each rotatably connected according to Figure 11 with a drive shaft 45, which in turn is rotatably connected to an eccentric cam 46.

On the outer circumference of the eccentric cam, the pump tappet 13 is spring-loaded with a roller, not shown, and is therefore also stroke-controlled and moves the membrane 27 up and down, so as to generate a negative pressure.

The embodiments shown thus show an independent drive of the vacuum pumps in the individual suction blocks, which operates independently of the drive of the conveyor belt 2 of the belt conveyor 1.

drawing Legend

1

belt conveyors

2

conveyor belt

3

gearing

4

idler pulley

5

idler pulley

6

Suction block a, b, c

7

conveyed

8th

arrow

9

suction cup

10

intake bore

11

guide rail

12

guide rail

13

pump plunger

14

role

15

feather

16

Saugblockfuß

17

arrow

18

leadership

19

check valve

20

vent valve

21

shut off bar

22

Setting for pump stroke

23

vent

24

lifting cylinder

25

arrow

26

Slide Strip

27

membrane

28

vent line

29

pump chamber

30

casing

31

ventilation duct

32

Drive belt for pump tappet 13

33

idler pulley

34

capstan

35

arrow

36

gearing

37

side plate

38

drive shaft

39

camp

40

camp

41

drive shaft

42

Drive belt for pump tappet 13

43

gearing

44

pinion

45

drive shaft

46

eccentric cam

47

arrow

Claims (20)

Vacuum conveyor for transport, storage and stacking of sheet-like conveyed material (7), which has a circulating conveyor belt (2) and is designed as a belt conveyor (1), wherein the conveyor belt (2) in the conveying direction behind one another and mutually spaced suction blocks (9) which essentially has a suction cup connected to a housing (30), which sucks, picks up, transports and deposits the conveyed material (7), characterized in that the housing (30) of the absorbent block (6, 6a, 6b, 6c) a stroke-controlled vacuum pump is arranged. Vacuum conveyor according to claim 1, characterized in that the designed as a mechanical tappet pump vacuum pump has a pump tappet (13) which rolls against a on a guide rail (12) of the belt conveyor (1) arranged backdrop (22) and performs a lifting movement, wherein the number the lifting movements per conveyor section of a freely selectable amplitude number of the link (22) is assigned. Vacuum conveyor according to Claim 1, characterized in that the vacuum pump designed as a mechanical tappet pump has a pump tappet (13) which operates spring-loaded against a drive belt (32, 42) which acts on the pump tappet in the direction of its longitudinal axis with lifting movements. Vacuum conveyor according to claim 3, characterized in that the drive belt (32, 42) is driven synchronously and concurrently with the conveyor belt. Vacuum conveyor according to one of claims 1 or 3, characterized in that the drive belt (32, 42) is driven independently of the conveyor belt (2) and in opposite directions to the conveyor belt (2). Vacuum conveyor according to one of the preceding claims 1 to 5, characterized in that the vacuum pump designed as a gear pump has an actuating gear which rolls on an associated rack on the guide rail (12) of the belt conveyor (1) and forms a lifting movement. Vacuum conveyor according to claim 6, characterized in that the vacuum pump designed as a gear pump has a drive pinion (44) which rolls on the toothing of a drive belt (42) which is driven independently of the conveyor belt. Vacuum conveyor according to one of the preceding claims 1 to 7, characterized in that the spring-loaded pump tappet (13) is connected in an air-tight manner via a check valve (19) to the interior of a suction bell (9) with the interposition of a membrane (27). Vacuum conveyor according to one of the preceding claims 1 to 8, characterized in that the conveyor belt (2) via a respective deflection roller (4, 5) runs, of which at least one is driven, said on its surface a plurality of arranged suction blocks (6, 6a , 6b, 6c) and is conveyed along on its inside on a fixed slide strip (26). Vacuum conveyor according to one of the preceding claims 1 to 9, characterized in that the suction block (6) has a housing (30), at the front end of a suction cup (9) is arranged, and that the suction blocks with the conveyor belt (2) rotate. Vacuum conveyor according to one of the preceding claims 1 to 10, characterized in that the suction bell (9) for receiving a conveyed material (7) is raised, overcomes a stroke and subsequently on the surface of the conveyed material (7) touches, at the same time a vacuum on the consisting of a preferably elastomeric material suction cup (9), such as rubber, rubber, plastic or the like is applied. Vacuum conveyor according to one of the preceding claims 1 to 11, characterized in that the suction bell (9) approximately in the center of its suction opening has a suction bore (10) behind which a check valve (19) is arranged, which is airtight with a pump chamber (29). connected is. Vacuum conveyor according to one of the preceding claims 1 to 12, characterized in that in the pump chamber (29) the rear end of the pump plunger (13) protrudes, in which a spring (15) is supported and the other end at the bottom of the pump chamber (29 ) is supported. Vacuum conveyor according to one of the preceding claims 1 to 13, characterized in that the pump chamber (29) has a further check valve (19) which is connected via a vent (23) with the atmosphere. Vacuum conveyor according to one of the preceding claims 1 to 14, characterized in that from the suction block (6) projecting side of the pump plunger (13) has a roller (14), which due to the spring load of the spring (15) to the surface of a fixed link (22) or a running drive belt (32) is pressed. Vacuum conveyor according to one of the preceding claims 1 to 15, characterized in that the movement of the pump tappet (13) in its longitudinal axis by the rolling along the roller (14) on a correspondingly curved link (22) in the region of the sliding strip (26) or a drive belt (32) is formed, wherein the vacuum by suction of the air through the suction bore (10) and discharging the compressed air in the pump chamber (29) via the outlet side arranged check valve (19) via the vent (23) is generated. Vacuum conveyor according to one of the preceding claims 1 to 16, characterized in that in the region of the guide rail (12) a piecewise existing shut-off strip (21) is arranged, which is stroke-controlled by a lifting cylinder (24), wherein the shut-off (21) downwards in Arrow direction (25) is movable, whereby a vent valve (20) comes to rest against the shut-off strip (21), is opened against the force of a spring and atmospheric air via the ventilation channel (31) in the suction cup (9) introduces. Vacuum conveyor according to one of the preceding claims 1 to 17, characterized in that the pump plunger (13) against the force of the spring (15) acts on an elastomeric deformable membrane (27) which forms the pump chamber (29), wherein the membrane (27 ) is ventilated and the back is connected via a vent line (28) with the atmosphere and the pump plunger (13) by support on the link (22) of the slide bar (26) or by support on a drive belt (32) rises and falls. Vacuum conveyor according to one of the preceding claims 1 to 18, characterized in that there is a drive belt (32) driven independently of the conveyor belt (22) of the belt conveyor (1), which runs over two deflection rollers (33, 34), wherein the deflection roller ( 34) is designed as a drive roller, and in this case takes place a rotary drive in opposite directions to the drive of the conveyor belt (2). Vacuum conveyor according to one of the preceding claims 1 to 19, characterized in that the drive belt (32) has on its outer side a wave-shaped link (22) for the generation of the pump stroke of the respective pump plunger (13).

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